2.5 V to 5.5 V Octal Voltage Output 8-/10-/12-Bit DACs in 16-Lead TSSOP AD5308/AD5318/AD5328 FEATURES APPLICATIONS AD5308: 8 buffered 8-bit DACs in 16-lead TSSOP Portable battery-powered instruments A version: 1 LSB INL, B version: 0.75 LSB INL Digital gain and offset adjustment AD5318: 8 buffered 10-bit DACs in 16-lead TSSOP Programmable voltage and current sources A version: 4 LSB INL, B version: 3 LSB INL Optical networking AD5328: 8 buffered 12-bit DACs in 16-lead TSSOP Automatic test equipment A version: 16 LSB INL, B version: 12 LSB INL Mobile communications Low power operation: 0.7 mA 3 V Programmable attenuators Guaranteed monotonic by design over all codes Industrial process control Power-down to 120 nA 3 V, 400 nA 5 V Double-buffered input logic Buffered/unbuffered/V reference input options DD Output range: 0 V to V or 0 V to 2 V REF REF Power-on reset to 0 V Programmability Individual channel power-down Simultaneous update of outputs (LDAC) Low power, SPI-, QSPI-, MICROWIRE-, and DSP- compatible 3-wire serial interface On-chip rail-to-rail output buffer amplifiers Temperature range: 40C to +125C Qualified for automotive applications GENERAL DESCRIPTION incorporate a power-on reset circuit, which ensures that the The AD5308/AD5318/AD5328 are octal 8-, 10-, and 12-bit DAC outputs power up to 0 V and remain there until a valid buffered voltage output DACs in a 16-lead TSSOP. They operate write to the device takes place. The outputs of all DACs may be from a single 2.5 V to 5.5 V supply, consuming 0.7 mA typical LDAC at 3 V. Their on-chip output amplifiers allow the outputs to updated simultaneously using the asynchronous input. swing rail-to-rail with a slew rate of 0.7 V/s. The AD5308/ The parts contain a power-down feature that reduces the current AD5318/AD5328 use a versatile 3-wire serial interface that consumption of the devices to 400 nA at 5 V (120 nA at 3 V). operates at clock rates up to 30 MHz and is compatible with The eight channels of the DAC may be powered down individually. standard SPI, QSPI, MICROWIRE, and DSP interface All three parts are offered in the same pinout, which allows standards. users to select the resolution appropriate for their application The references for the eight DACs are derived from two without redesigning their circuit board. reference pins (one per DAC quad). These reference inputs can be configured as buffered, unbuffered, or V inputs. The parts DD Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20022011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. AD5308/AD5318/AD5328 TABLE OF CONTENTS Features .............................................................................................. 1 Low Power Serial Interface ....................................................... 18 Applications....................................................................................... 1 Load DAC Input (LDAC) Function......................................... 18 General Description ......................................................................... 1 Double-Buffered Interface ........................................................ 18 Revision History ............................................................................... 2 Microprocessor Interface............................................................... 19 Functional Block Diagram .............................................................. 3 ADSP-2101/ADSP-2103-to-AD5308/AD5318/AD5328 Interface....................................................................................... 19 Specifications..................................................................................... 4 68HC11/68L11-to-AD5308/AD5318/AD5328 Interface ..... 19 Absolute Maximum Ratings............................................................ 7 80C51/80L51-to-AD5308/AD5318/AD5328 Interface......... 19 ESD Caution.................................................................................. 7 Microwire-to-AD5308/AD5318/AD5328 Interface.............. 20 Pin Configuration and Function Descriptions............................. 8 Applications Information .............................................................. 21 Typical Performance Characteristics ............................................. 9 Typical Application Circuit....................................................... 21 Terminology .................................................................................... 13 Driving VDD from the Reference Voltage ................................ 21 Theory of Operation ...................................................................... 15 Bipolar Operation Using the AD5308/AD5318/AD5328..... 21 Digital-to-Analog Converter .................................................... 15 Opto-Isolated Interface for Process Control Applications ... 21 Resistor String............................................................................. 15 Decoding Multiple AD5308/AD5318/AD5328s.................... 22 Output Amplifier........................................................................ 15 Outline Dimensions....................................................................... 24 Power-On Reset .......................................................................... 16 Ordering Guide .......................................................................... 24 Power-Down Mode .................................................................... 16 Serial Interface ............................................................................ 16 REVISION HISTORY 4/11Rev. E to Rev. F Added Automotive Products Information ................. Throughout 2/11Rev. D to Rev. E Change to Temperature Range .................................... Throughout Changes to Table 3, t4 Timing Characteristics.............................. 6 3/07Rev. C to Rev. D Updated Format..................................................................Universal Changes to Absolute Maximum Ratings Section......................... 7 9/05Rev. B to Rev. C Updated Format..................................................................Universal Change to Equation........................................................................ 21 11/03Rev. A to Rev. B Changes to Ordering Guide ............................................................ 4 Changes to Y axis on TPCs 12, 13, and 15 .................................... 9 8/03Rev. 0 to Rev. A Added A Version.................................................................Universal Changes to Features.......................................................................... 1 Changes to Specifications................................................................ 2 Edits to Absolute Maximum Ratings ............................................. 4 Edits to Ordering Guide .................................................................. 4 Updated Outline Dimensions ....................................................... 18 Rev. F Page 2 of 28